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参数资料
| 型号： | LTC1609ISW#TR |
| 厂商： | Linear Technology |
| 文件页数： | 8/24页 |
| 文件大小： | 0K |
| 描述： | IC A/DCONV 16BIT SRL SAMP 20SOIC |
| 标准包装： | 1,000 |
| 位数： | 16 |
| 采样率（每秒）： | 200k |
| 数据接口： | 串行 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 100mW |
| 电压电源： | 模拟和数字 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 带卷 (TR) |
| 输入数目和类型： | 3 个单端，单极；3 个单端，双极 |
| 其它名称： | LTC1609ISWTR |
16
LTC1609
1609fa
External Data Clock Data Read After the Conversion
Figure 10 shows how the result from the current conver-
sion can be read out after the conversion has been com-
pleted. The externally supplied data clock is running
continuously. CS and R/C are first used together to initiate
a conversion and then CS is used to read the result. The
conversion starts on the falling edge of CS with R/C low.
Both CS and R/C should be returned high within 1.2
s to
prevent the transition from disturbing the conversion.
After the conversion has been completed (BUSY returning
high), a pulse on the SYNC pin will be generated after the
first rising edge of DATACLK #1 that occurs after CS goes
low (R/C high). The SYNC output can be captured on the
falling edge of DATACLK #1 or on the rising edge of
DATACLK #2. After the rising edge of DATACLK #2, the
SYNC output will go low and the MSB will be clocked out
on the DATA pin. This bit can be latched on the falling edge
of DATACLK #2 or on the rising edge of DATACLK #3. The
LSB will be valid on the falling edge of DATACLK #17 or the
rising edge of DATACLK #18. After the rising edge of
DATACLK #18 the DATA pin will take on the value of the
TAG pin that occurred at the rising edge of DATACLK #2.
Using the highest frequency permitted for DATACLK
(20MHz), shifting the data out after the conversion will not
degrade the 200kHz throughput.
External Discontinuous Data Clock Data Read
During the Conversion
Figure 11 shows how the result from the previous conver-
sion can be read out during the current conversion. The
externally supplied data clock is running discontinuously.
R/C is used to initiate a conversion with CS tied low. The
conversion starts on the falling edge of R/C. R/C should be
returned high within 1.2
s to prevent the transition from
disturbing the conversion. A pulse on the SYNC pin will be
generated on rising edge of DATACLK #0. The SYNC
output can be captured on the falling edge of DATACLK #0
or on the rising edge of DATACLK #1. After the rising edge
of DATACLK #1, the SYNC output will go low and the MSB
will be clocked out on the DATA pin. This bit can be latched
on the falling edge of DATACLK #1 or on the rising edge of
DATACLK #2. The LSB will be valid on the falling edge of
DATACLK #16. Another clock pulse would be needed if the
LSB is captured on a rising edge. A minimum of 17 clock
pulses are required if the data is captured on falling clock
edges.
APPLICATIO S I FOR ATIO
WU
UU
0
1
2
3
4
17
18
TAG0
TAG
DATA
SYNC
BUSY
R/C
CS
EXTERNAL
DATACLK
TAG1
TAG2
TAG15
B1
B14
B15
(MSB)
B0
TAG0
TAG1
TAG16
TAG17
TAG18
TAG19
1606 F10
t23
t24
t18
t17
t3
t2
t16
t15
t13
t14
t1
t12
t19
t12
Figure 10. Conversion and Read Timing with External Clock (EXT/INT Tied High). Read After Conversion
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